How to read the band →
Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Diana
Diana is now well below its former popularity. All-time it's been given to 426,127 U.S. babies, the 523rd most common name by sound today, peaking at 11,230 in 1957, with 1,345 in 2025.
By sound, Diana also includes the spellings Dianna.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).